If you accidently delete a file or folder in your University OneDrive then you may be able to recover it from later from your OneDrive recycle bin. Items stay in your OneDrive recycle bin for 30 days. This Microsoft support page explains the procedure.

Microsoft has also given you the functionality of being able to restore your OneDrive. If lots of your OneDrive files get deleted, overwritten, corrupted, or infected by malware, you can restore your entire OneDrive to a previous time. Files Restore helps you to undo all the actions that occurred on both files and folders up to the last 30 days.

There are some limitations and restrictions around the restore procedure, details can be found on this Microsoft support page.